Actuating system for a drum brake

Abstract

An actuating system for a drum brake of a vehicle, in particular of a commercial vehicle or an agricultural machine, comprising at least a brake lining carrier ( 2 ) which is guided on a brake bracket ( 4 ), an actuating element ( 6; 60 ) in order to move the brake lining carrier ( 2 ) towards the inner circumference of a brake drum ( 52 ), and a setting means ( 8 ) in order to control the actuating element ( 6; 60 ), wherein the actuating element ( 6; 60 ) is designed as a hollow body, in the cavity ( 10 ) of which an axle body ( 50; 150 ) is accommodated.

1 . An actuating system for a drum brake of a vehicle, in particular of a commercial vehicle or an agricultural machine, comprising
 at least a brake lining carrier ( 2 ) which is guided on a brake bracket ( 4 ), an actuating element ( 6 ;  60 ) in order to move the brake lining carrier ( 2 ) towards the inner circumference of a brake drum ( 52 ), and   a setting means ( 8 ) in order to control the actuating element ( 6 ;  60 ),   wherein the actuating element ( 6 ;  60 ) is designed as a hollow body, in the cavity ( 10 ) of which an axle body ( 5 ;  150 ) is accommodated.   
     
     
         2 . The actuating system of  claim 1 , wherein the actuating element ( 6 ) is rotatorily movable with respect to the axle body ( 50 ), and wherein the axis of rotation (x) of the actuating element ( 6 ) preferably is aligned with the longitudinal axis of the axle body ( 50 ). 
     
     
         3 . The actuating system of any one of the preceding claims, wherein the actuating element ( 6 ;  60 ) has at least a radial projection ( 12 ;  62 ) which can be engaged with the brake lining carrier ( 2 ) when the actuating element ( 6 ;  60 ) is actuated. 
     
     
         4 . The actuating system of  claim 3 , wherein the outer circumference of the actuating element ( 6 ;  60 ) is designed such that it continuously widens in the area of the projection ( 12 ;  62 ). 
     
     
         5 . The actuating system of any one of the preceding claims, wherein the actuating element ( 60 ) is translatorily movable with respect to the axle body ( 150 ), and wherein its axis of translation (y) intersects the longitudinal axis of the axle body either perpendicularly or is designed parallel thereto. 
     
     
         6 . The actuating system of any one of the preceding claims, wherein the actuating element ( 6 ;  60 ) has engaging means ( 16 ), with which corresponding engaging means ( 18 ) of the setting means ( 8 ) can engage in order to control the actuating element ( 6 ;  60 ). 
     
     
         7 . The actuating system of  claim 6 , wherein the engaging means ( 16 ) of the actuating element ( 6 ;  60 ) are designed at its surface area, and the setting means ( 8 ) preferably is designed as a shaft or a pinion with outer teeth, which shaft or pinion is arranged essentially parallel to the longitudinal axis of the axle body ( 50 ;  150 ). 
     
     
         8 . The actuating system of  claim 6 , wherein the engaging means of the actuating element ( 6 ;  60 ) are designed at its end face, and the setting means ( 8 ) preferably is designed as a shaft or a pinion with outer teeth, which shaft or pinion is arranged slanted, preferably perpendicular, to the longitudinal axis of the axle body. 
     
     
         9 . The actuating system of any one of the preceding claims, wherein the brake lining carrier ( 2 ) is guided translatorily and/or rotatorily on the brake bracket ( 4 ). 
     
     
         10 . Drum brake system of a vehicle, in particular of a commercial vehicle or an agricultural machine, comprising:
 at least a brake lining carrier ( 2 ) which is guided on a brake bracket ( 4 ), an actuating element ( 6 ;  60 ) in order to approach the brake lining carrier ( 2 ) towards the inner circumference of a brake drum ( 52 ),   a setting means ( 8 ) in order to control the actuating element ( 6 ;  60 ), and a pneumatically actuatable braking cylinder which is operatively connected or can be operatively connected with the setting means ( 8 ),   wherein the actuating element ( 6 ;  60 ) is designed as a hollow body, in the cavity ( 10 ) of which an axle body ( 50 ;  150 ) is accommodated.